/**
 * UGENE - Integrated Bioinformatics Tools.
 * Copyright (C) 2008-2020 UniPro <ugene@unipro.ru>
 * http://ugene.net
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 */

#include "QDConstraint.h"

#include <U2Lang/BaseTypes.h>

namespace U2 {

const QDConstraintType QDConstraintTypes::DISTANCE("QD_Distance_Constraint");

QDDistanceConstraint::QDDistanceConstraint(const QList<QDSchemeUnit *> &_units, QDDistanceType type, int min, int max)
    : QDConstraint(_units, QDConstraintTypes::DISTANCE), distType(type) {
    assert(_units.size() == 2);
    cfg = new QDParameters;

    Descriptor mind(QDConstraintController::MIN_LEN_ATTR, QObject::tr("Min distance"), QObject::tr("Minimum distance"));
    Descriptor maxd(QDConstraintController::MAX_LEN_ATTR, QObject::tr("Max distance"), QObject::tr("Maximum distance"));

    Attribute *minAttr = new Attribute(mind, BaseTypes::NUM_TYPE(), true, QVariant(min));
    Attribute *maxAttr = new Attribute(maxd, BaseTypes::NUM_TYPE(), true, QVariant(max));

    cfg->addParameter(minAttr->getId(), minAttr);
    cfg->addParameter(maxAttr->getId(), maxAttr);
}

QDDistanceConstraint::~QDDistanceConstraint() {
    delete cfg;
}

int QDDistanceConstraint::getMin() const {
    return cfg->getParameter(QDConstraintController::MIN_LEN_ATTR)->getAttributeValueWithoutScript<int>();
}

int QDDistanceConstraint::getMax() const {
    return cfg->getParameter(QDConstraintController::MAX_LEN_ATTR)->getAttributeValueWithoutScript<int>();
}

void QDDistanceConstraint::setMin(int min) {
    cfg->setParameter(QDConstraintController::MIN_LEN_ATTR, qVariantFromValue(min));
}

void QDDistanceConstraint::setMax(int max) {
    cfg->setParameter(QDConstraintController::MAX_LEN_ATTR, qVariantFromValue(max));
}

QString QDDistanceConstraint::getText(QDSchemeUnit *, QDSchemeUnit *) const {
    int minVal = getMin();
    int maxVal = getMax();
    if (minVal == maxVal) {
        return QString("%1 bp").arg(QString::number(minVal));
    }
    return QString("%1..%2 bp").arg(QString::number(minVal)).arg(QString::number(maxVal));
}

void QDDistanceConstraint::invert() {
    units.swap(0, 1);
    setMin(-getMax());
    setMax(-getMin());
    distType = QDConstraintController::getInvertedType(distType);
}

//QDConstraintController
//////////////////////////////////////////////////////////////////////////
const QString QDConstraintController::DISTANCE_CONSTRAINT_EL("distance");
const QString QDConstraintController::TYPE_ATTR("type");
const QString QDConstraintController::MIN_LEN_ATTR("min");
const QString QDConstraintController::MAX_LEN_ATTR("max");
const QString QDConstraintController::SRC_ATTR("src");
const QString QDConstraintController::DST_ATTR("dst");

QDDistanceType QDConstraintController::getInvertedType(QDDistanceType type) {
    if (type == E2E) {
        return S2S;
    }
    if (type == S2S) {
        return E2E;
    }
    return type;
}

bool QDConstraintController::match(QDConstraint *c, const QDResultUnit &r1, const QDResultUnit &r2, bool complement) {
    QDDistanceConstraint *dc = static_cast<QDDistanceConstraint *>(c);
    assert(dc);

    const U2Region &reg1 = r1->region;
    const U2Region &reg2 = r2->region;

    const QDDistanceType &dist = dc->distanceType();

    int min = dc->getMin();
    int max = dc->getMax();

    if (dc->getSource() == r1->owner) {
        if (complement) {
            return match(reg2, reg1, getInvertedType(dist), min, max);
        } else {
            return match(reg1, reg2, dist, min, max);
        }
    } else {
        assert(dc->getSource() == r2->owner);
        if (complement) {
            return match(reg1, reg2, getInvertedType(dist), min, max);
        } else {
            return match(reg2, reg1, dist, min, max);
        }
    }
}

bool QDConstraintController::match(const U2Region &srcReg,
                                   const U2Region &dstReg,
                                   const QDDistanceType &type,
                                   int min,
                                   int max) {
    switch (type) {
    case E2S: {
        int srcEnds = srcReg.endPos();
        int dstStarts = dstReg.startPos;
        int distance = dstStarts - srcEnds;
        if (distance <= max && distance >= min) {
            return true;
        }
    }
        return false;
    case S2E: {
        int srcStarts = srcReg.startPos;
        int dstEnds = dstReg.endPos();
        int distance = dstEnds - srcStarts;
        if (distance <= max && distance >= min) {
            return true;
        }
    }
        return false;
    case S2S: {
        int srcStarts = srcReg.startPos;
        int dstStarts = dstReg.startPos;
        int distance = dstStarts - srcStarts;
        if (distance <= max && distance >= min) {
            return true;
        }
    }
        return false;
    case E2E: {
        int srcEnds = srcReg.endPos();
        int dstEnds = dstReg.endPos();
        int distance = dstEnds - srcEnds;
        if (distance <= max && distance >= min) {
            return true;
        }
    }
        return false;
    }
    return false;
}

U2Region QDConstraintController::matchLocation(QDDistanceConstraint *dc, const QDResultUnit &r, bool complement) {
    int start = 0;
    int end = 0;

    QDSchemeUnit *src = NULL;
    QDSchemeUnit *dst = NULL;
    QDDistanceType type = dc->distanceType();
    int minDist = dc->getMin();
    int maxDist = dc->getMax();

    if (complement) {
        src = dc->getDestination();
        dst = dc->getSource();
        type = getInvertedType(type);
    } else {
        src = dc->getSource();
        dst = dc->getDestination();
    }

    if (src == r->owner) {
        int len = dst->getActor()->getMaxResultLen();
        switch (type) {
        case E2S:
            start = r->region.endPos() + minDist;
            end = r->region.endPos() + maxDist + len;
            break;
        case E2E:
            end = r->region.endPos() + maxDist;
            start = r->region.endPos() + minDist - len;
            break;
        case S2S:
            start = r->region.startPos + minDist;
            end = r->region.startPos + maxDist + len;
            break;
        case S2E:
            end = r->region.startPos + maxDist;
            start = r->region.startPos + minDist - len;
            break;
        }
    } else {
        assert(dst == r->owner);
        int len = src->getActor()->getMaxResultLen();
        switch (type) {
        case E2S:
            start = r->region.startPos - maxDist - len;
            end = r->region.startPos - minDist;
            break;
        case E2E:
            end = r->region.endPos() - minDist;
            start = r->region.endPos() - maxDist - len;
            break;
        case S2S:
            start = r->region.startPos - maxDist;
            end = r->region.startPos - minDist + len;
            break;
        case S2E:
            start = r->region.endPos() - maxDist;
            end = r->region.endPos() - minDist + len;
            break;
        }
    }

    return U2Region(start, end - start);
}

}    // namespace U2
